<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>列表</title>
    <style>
        ol{
            list-style-type: lower-alpha;
        }
        ul{
            list-style-type:armenian;
        }
        #o1{
            list-style: none;
        }
    </style>
</head>
<body>
   
   <ol>
    <li>one</li>
    <li>two</li>
    <li>three</li>
    <li>four</li>

   </ol>
  <ul> 
    <li>one</li>
    <li>two</li>
    <li>three</li>
    <li>four</li>
</ul>\<ol id="o1">
    <li>one</li>
    <li>two</li>
    <li>three</li>
    <li>four</li>

   </ol>
</body>
</html>